Taylor Swift and Miley Cyrus are two singers who are in the holiday spirit all year long ... at least when it comes to being generous!

The two ladies have topped DoSomething.org's most charitable stars of the year list.

Swift, 23, recently donated $4 million to the Country Hall of Fame museum. Tay was also awarded the Ripple of Hope Award from the Robert F. Kennedy Center ... which recognizes celebs for their charitable efforts.

As for Miley, the "Can't Be Tamed" singer put her star power behind Saving Spot! Rescue, a non-profit dedicated to finding dogs from high-kill shelters a home.